Extension-tool.



No, 821,527. v PATENTED MAY 22, 1906. P. OREILLEY a; F. G. FRBESB.

EXTENSION TOOL.

APPLIGATIUN FILED 11110.24, 1904.

PHILIP OBEILLEY AND FRANK c.

raTnnT orrioii.

FREESE, OF PHILADELPHIA, PENN- SYLVANIA.

EXTENSION-TOOL;

To all whom it may concern.-

Be it known that we, PHILIP OREILLEY and FRANK G. FREESE, citizens ofthe United States, residing at Philadelphia, Pennsylvania, have inventedcertain Improvements in Extension-Tools, of which the following is aspecification.

The object of our invention is to provide a supplementary tool which canbe intraduced between a high-speed air or steam-driven tool and a tap ornipple, so that this class of tools can be used for tapping and drivingnippies into holes in plates.

Our invention is particularly adapted for use in tapping of holes andthe placing of nipples in steam-boilers, such as locomotives, whereheretofore the holes for the nipples were tapped by hand and the nippleswere forced in the tapped holes also by hand, making it a tedious andexpensive operation and also making it necessary to calk the jointbetween the nipple and the boiler-plate.

By our invention we are enabled to rapidly and accurately tap the holeand drive the nipple in with such .force that calking is unnecessary,and we do not destroy the efliciency of the air-tool for other purposes.

Referring to the accompanying drawings, Figure 1 is a perspective Viewof our improved extension-tool. Fig. 2 is a sectional view, and Fig. 3is a sectional view showing a boiler plate with a nipple and stay-boltin place.

A is a casing having a handle B, extending from one end. This handle inthe present instance is screw-threaded and is screwed in one end of thecasing. The handle can be of any length and is grasped by one of theoperatives to prevent the casing from turning when the other mechanismis applied.

Mounted in the casing is a spindle D, which extends through the lowerportion of the easing and is provided with a square or other shapedopening (1, to which the shaped end of the tap or nipple holder C can beapplied. Mounted on the upper end of the spindle D is a pinion E, whichextends through a bearing a in the casing. This pinion has a head 6,which is internally screw-threaded to receive the driving-spindle of thepneumatic or other tool, which is ordinarily driven at a high rate ofspeed. The periphery of this extension is preferably hexagonal in shape,so that a wrench can be applied, if necessary. In the present instancethe pinion E is loose on the Specification of Letters Patent.Application filed December 24. 1904. Serial No. 238.219.

Patented May 22, 1:506.

spindle D and is held in place by a headed screw 61, which is screwed inthe end of the spindle. Secured to the lower portion of the spindleD isa gear-wheel F of greater diatne ter than the pinion. E.

Mounted in the casing is a stud G, having head 9 at one end and threadedat the opposite end to receive a nut g. Loose on tl is stud is a pinionI, which meshes with the gear-wheel F, and secured to-the extended hub91 of this pinion is a gear-wheel H, which meshes with the pinion E, sothat when power is applied to the pinion it is transmitted from thepinion to the gear-wheel II, from the gear-wheel to the pinion I, as itis connected with it, and from the pinion I to the pinion F, which issecured to the spindle D. Thus the speed is considerably reduced whilethe power is increased at the spindle, so that a high-speed air-tool oflight power can be used for tapping and for forcingthe nipple into theboiler-plate. This forcing of the nipple into the boiler-plate requiresconsiderable power and would necessitate rather an elaborate machine oflarge size to accomplish the object which we attain in a smallermachirlie by the introduction of our extensiontoo Referring to Fig. 3, Mis the boiler-shell, which has a threaded opening for the reception of anipple N, which has a tapered portion it and a' straight portion it,both the straight and tapered portions being threaded, as illustrated.The interior of the nipple is cupped to receive the head m of thestay-bolt m and is provided with a cap i which is screwed onto thestraight portion n, the tapered portion of the nipple being screwed intothe boiler-shell by our improved tool. The nipple-holder C has a squaredportion a at one end fitting the opening (Z in the end of the spindle D,and has a flange at the opposite end which in the present instance isformed by screw-threading the head 0 and applying thereto a nut 0 whichhas a thread which meshes with the straight portion n of the nipple N.This nut is firmly secured to the head 0 by a pin or key. Projectingfrom the end of the nipple-holder is an extension 0 which is arranged tofit the seat in the nip ple, so that when the nipple is screwed into thenut the extension will rest against the seat and hold the nipplerigidly, preventing it from stripping the thread when the nipple tachedto the spindle D of our improved tool, 5

power is applied, and the pneumatic tool is driven at a high speed, butthe tap is driven at a comparatively slow speed through the interventionof our improved tool.

After the tap has threaded the hole in the boiler-plate it is removedand the nipple-holder C is api venting removal of the pinion from saidspinplied to the tool, as shown in the drawings, and the nipple attachedto the end of the nipple-holder by screwing it into the nut 0 until theextension 0 seats itself. The nipple is then introduced into thethreaded opening in the boiler-plate and power is applied, and thenipple is driven until the nut 0 comes in contact with the outer surfaceof the boiler-plate or until the tool will not drive it farther into theplate, which is sometimes the case. Then our improved tool is detachedfrom the nipple, holder and the nipple-holder backed off from thenipple. When the nipple is in place, a stay-bolt is passed through it,as shown in Fig. 3, and the cap N is applied. It will be seen that weare enabled by a very simple and compact tool to adapt a machine for usechine without having to design a special and cumbersome tool for thispurpose.

We claim as our invention- Thecombination in an extension-tool of acasing, a handle therefor, a driven spindle projecting from one end ofthe casing, a pinion having a head projecting from the other end of thecasing and mounted on said spindle so as to be removable from the casingby movement in the line of the spindle, a screw carried by one of themembers comprised by the pinion and the spindle for normally predlewhile allowing it to turn freely thereon, a stud extending through thecasing at one side of the spindle, a gear-wheel and a pinion mounted onsaid stud, the gear-wheel meshing with the pinion on the driven spindle,and a gear-wheel secured to the driven spindle and meshing with thelast-mentioned pinion, substantially as described.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses.

PHILIP OREILLEY. FRANK G. FREESE. Witnesses:

WILLIAM VALLMER, LEON P. THOMAS.

